Quick question on G43

[Beechdrvr]

I’m pretty new to this so what I’m wondering is when I call for T1(tool 1) and the G43 for the tool offset H1, can I manipulate the tool diameter in the offset library to change a diameter of an interpolated bore let’s say in the program without changing the program? This would be accounting for tool wear in this scenario.
I understand that if T1 is called and uses the D1 info in the library that it will effect all the dimensions in the program as well.
It’s just curious to me that when I call T1, that a G43 needs to be associated with it with no mention of a D1 as well.
Thanks in advance
Doug

P. am planning on experimenting with this but figured Id check her first.

[cncsnw]

G43 only applies to tool height offsets (indexed with the H code), and therefore only affects Z dimensions.

Tool diameter offsets (indexed with the D code) are only active when you use G41 and G42.

Unlike G43, which you can turn on at the tool change and just leave on, G41 and G42 have to be used more surgically: approach the workpiece; turn on G41 or G42 with the desired D offset; lead in to the work piece; go around the cut; cancel G41/G42 using a G40; and lead out.

In the absence of G41 or G42, the D value does not affect part dimensions at all.

[Beechdrvr]

Thank you very much. That answers a lot. Gives me some direction. I’ve been running some simple Fusion360 programs which I’ve had to modify a bit to get to work as far as tool changes (T1,..) Goibg to start to work the G41-42 in there now.
Thanks again